Air spring forming reel mechanism

Abstract

The present application relates to the technical field of air spring, in particular to a kind of air spring forming reel mechanism, including fixed seat, the top of the fixed seat is fixedly installed with mounting seat, the top of the mounting seat is rotatably installed with two groups of rotating shafts, the one side of the mounting seat is fixedly installed with motor, the right side of the mounting seat is provided with transmission belt, the two ends of the transmission belt are respectively and one group of rotating shaft and motor output shaft transmission installation, the inside of the mounting seat is provided with the fit drum, the inside of the fit drum is rotatably installed with driving shaft, the driving shaft and rotating shaft are connected, the fit drum can rotate coaxially with rotating shaft, the outer surface of the fit drum is spaced apart along its ring direction and is provided with several air holes.The installation assembly can realize the quick disassembly and assembly of the fit drum, can stably limit the fit drum when installing, ensure that it is coaxial linkage with rotating shaft, when disassembling, it is easy to operate, different models of fit drum can be quickly replaced, and it is suitable for the processing needs of various specifications of air spring.

Description

Technical Field

[0001] This invention relates to the field of air spring technology, specifically to an air spring forming roll mechanism. Background Technology

[0002] An air spring is a device that uses compressed air to fill a sealed container and utilizes the compressibility of gas to achieve its elastic effect. Air springs have ideal non-linear elastic characteristics. After adding a height adjustment device, the vehicle height does not change with the increase or decrease of load. The stiffness of the limit torsion spring can be designed to be low, resulting in good ride comfort. An air spring is composed of several layers of rubber curtains and steel rings at both ends pressed together to form a capsule, which is then vulcanized and shaped under high temperature and high pressure. The main function of the air spring forming machine forming drum assembly is to drive the bonding drum to rotate, realize the bonding and pressing of materials, and form a cylindrical capsule semi-finished product.

[0003] The roll mechanism is the core equipment in the air spring molding process. Its main function is to achieve the winding and bonding of the rubber material by rotating the bonding drum, and finally complete the molding of the air spring bladder. Existing roll forming mechanisms mostly use traditional methods such as bolt fixing and key connection for the bonding drum. When processing different models of air springs, multiple fasteners need to be removed with special tools to replace the bonding drum. This operation is cumbersome, time-consuming, and labor-intensive. It not only reduces production changeover efficiency but also easily damages the main shaft or bonding drum during disassembly. Moreover, the drive belt may loosen or slip due to wear, thermal expansion and contraction during long-term high-speed operation, which will affect the flatness of the rubber material winding, increase the wear of transmission components, and shorten the service life of the equipment. The vacuum system is often directly connected to the outside environment. Dust, impurities, and debris generated during rubber material processing can easily enter the solenoid valve, vent, and vacuum hole, causing pipeline blockage and solenoid valve jamming. This affects the vacuum adsorption effect and the smoothness of unloading, leading to adhesion between the forming capsule and the bonding drum and damage during unloading. Therefore, an air spring forming roll mechanism is proposed to solve the problems mentioned above. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides an air spring forming drum mechanism. This addresses the problems of traditional methods, such as bolt fixing and key connection, which often involve replacing air springs of different models with multiple fasteners using specialized tools. This cumbersome and time-consuming process not only reduces production changeover efficiency but also risks damage to the main shaft or forming drum during disassembly. Furthermore, the drive belt, during long-term high-speed operation, can loosen and slip due to wear, thermal expansion, and contraction, affecting the flatness of the rubber winding, increasing wear on transmission components, and shortening equipment lifespan. Additionally, the vacuum system is often directly connected to the outside environment, allowing dust, impurities, and debris from the rubber processing to easily enter the solenoid valves, vents, and vacuum ports, causing blockages and solenoid valve malfunctions. This negatively impacts vacuum adsorption and unloading smoothness, leading to adhesion between the forming capsule and the forming drum, and damage during unloading.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an air spring forming drum mechanism, comprising a fixed base, an mounting base fixedly mounted on the top of the fixed base, two sets of rotating shafts rotatably mounted on the top of the mounting base, a motor fixedly mounted on one side of the mounting base, a transmission belt disposed on the right side of the mounting base, the two ends of the transmission belt being respectively connected to one set of rotating shafts and the output shaft of the motor, a fitting drum disposed inside the mounting base, a drive shaft rotatably mounted inside the fitting drum, the drive shaft and the rotating shaft being engaged, the fitting drum being coaxially rotatable with the rotating shaft, a plurality of vent holes spaced circumferentially on the outer surface of the fitting drum, a set of vacuum holes spaced axially on the outer surface of the fitting drum, a solenoid valve disposed on the right side of the mounting base, an installation assembly disposed inside the mounting base, a filter assembly disposed to the right side of the solenoid valve, and an adjustment assembly disposed on the right side of the mounting base.

[0006] Preferably, the mounting assembly includes two sets of arc-shaped blocks. Both ends of the drive shaft are located inside the rotating shaft. The bottom of the arc-shaped block is in contact with the surface of the drive shaft. A mounting block is fixedly installed on the outer side of the arc-shaped block. An mounting groove is formed inside the rotating shaft. A round rod is fixedly installed on the bottom of the inner wall of the mounting groove. A round sleeve is slidably installed on the surface of the round rod. A rhombus-shaped block is fixedly installed on the top of the round sleeve. A first rhombus-shaped groove is formed on the top of the mounting block. A second rhombus-shaped groove is formed inside the first rhombus-shaped groove. The bottom of the rhombus-shaped block is in contact with the bottom of the inner wall of the second rhombus-shaped groove.

[0007] Preferably, a circular block is rotatably mounted on the bottom of the circular sleeve surface, a limiting tension spring is sleeved on the surface of the circular rod, the bottom of the limiting tension spring is fixedly mounted to the bottom of the inner wall of the mounting groove, and the top of the limiting tension spring is fixedly mounted to the bottom of the circular block.

[0008] Preferably, the filter assembly includes a filter screen, the surface of which contacts the interior of the solenoid valve. Two sets of stops are rotatably mounted on the right side of the solenoid valve, the left side of which contacts the right side of the filter screen. A limit torsion spring is fixedly mounted on the outer side of the stops. A rectangular block is fixedly mounted on the right side of the solenoid valve, and the top of the rectangular block is fixedly mounted on the top of the limit torsion spring.

[0009] Preferably, two sets of positioning plates are fixedly installed on the right side of the filter screen, and the outer side of the positioning plates contacts the inner side of the block.

[0010] Preferably, the limiting torsion spring has an arc-shaped rod inside, the bottom of the arc-shaped rod extends through to the bottom of the rectangular block, the inner end of the arc-shaped rod extends through to the inner side of the stop block, and the arc-shaped rod is slidably installed with the stop block and the rectangular block.

[0011] Preferably, a circular block is fixedly installed at the inner end of the arc-shaped rod, wherein the tops of two sets of circular blocks are in fixed contact with the bottom of the rectangular block, and the outer ends of the other two sets of circular blocks are in contact with the inner side of the stop block.

[0012] Preferably, a positioning block is fixedly installed on the top of the filter screen, a positioning rod is fixedly installed on the left side of the positioning block, and a positioning groove is opened on the right side of the solenoid valve, with the positioning rod and the positioning groove being inserted into each other.

[0013] Preferably, the adjusting assembly includes an adjusting wheel, the surface of which contacts the interior of the transmission belt, an adjusting block is rotatably mounted on the left end of the adjusting wheel, and an electric push rod is fixedly mounted on the right side of the mounting base, with the telescopic end of the electric push rod fixedly mounted on one side of the adjusting block.

[0014] Preferably, a stabilizing block is fixedly installed on the left side of the adjusting block, and a stabilizing groove is provided on the right side of the mounting base, with the stabilizing block and the stabilizing groove being slidably installed.

[0015] Compared with the prior art, the present invention provides an air spring forming drum mechanism, which has the following beneficial effects: 1. The mounting components enable quick assembly and disassembly of the bonding drum. During installation, the bonding drum is securely positioned to ensure coaxial linkage with the rotating shaft. Disassembly is simple and allows for quick replacement of different models of bonding drums, adapting to various specifications of air spring processing needs.

[0016] 2. The filter assembly can effectively filter impurities in the air path, preventing blockage of the solenoid valve, vent, and vacuum port. Moreover, the filter screen is easy to install and remove, and its positioning is reliable. It can be quickly disassembled for cleaning or replacement, ensuring long-term smooth and stable air path.

[0017] 3. The adjustment component can automatically adjust the tension of the transmission belt, effectively preventing the belt from loosening and slipping, ensuring stable power transmission, making the rotational shaft and the contact drum rotate at a uniform speed, and improving the operating accuracy and stability of the equipment. Attached Figure Description

[0018] Figure 1 This is a front view of the structural fixing base of the present invention; Figure 2 This is a right view of the structural fixing base of the present invention; Figure 3 This is a cross-sectional view of the mounting base of the present invention; Figure 4 This is a schematic diagram of the structure adjustment block of the present invention; Figure 5 This is a partial cross-sectional view of the solenoid valve structure of the present invention; Figure 6 This is an exploded view of the rhomboid block and the first rhomboid groove of the present invention. Figure 7 For the present invention Figure 2 Enlarged structural diagram at point A in the middle; Figure 8 For the present invention Figure 5 Enlarged structural diagram at point B; Figure 9 For the present invention Figure 5 Enlarged structural diagram at point C; Figure 10 For the present invention Figure 3 Enlarged structural diagram at point D; Figure 11 For the present invention Figure 3 Enlarged structural diagram at point E in the middle.

[0019] In the diagram: 1. Fixed base; 2. Mounting base; 3. Rotating shaft; 4. Motor; 5. Drive belt; 6. Fitting drum; 7. Drive shaft; 8. Vent hole; 9. Vacuum hole; 10. Solenoid valve; 11. Mounting assembly; 110. Arc-shaped block; 111. Mounting block; 112. Mounting groove; 113. Round rod; 114. Round sleeve; 115. Rhombus block; 116. First rhombus groove; 117. Second rhombus groove; 118. Round block; 119. Limiting tension spring; 12. Filter assembly; 120. Filter screen; 121. Stop block; 122. Limiting torsion spring; 123. Rectangular block; 124. Positioning plate; 125. Arc rod; 126. Circular block; 127. Positioning block; 128. Positioning rod; 129. Positioning groove; 13. Adjusting assembly; 130. Adjusting wheel; 131. Adjusting block; 132. Electric push rod; 133. Stabilizing block; 134. Stabilizing groove. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example: Please see Figure 1 - Figure 11 An air spring forming drum mechanism in this embodiment includes a fixed base 1, a mounting base 2 fixedly mounted on the top of the fixed base 1, two sets of rotating shafts 3 rotatably mounted on the top of the mounting base 2, a motor 4 fixedly mounted on one side of the mounting base 2, a transmission belt 5 provided on the right side of the mounting base 2, the two ends of the transmission belt 5 being connected to one set of rotating shafts 3 and the output shaft of the motor 4 respectively, a fitting drum 6 being provided inside the mounting base 2, a drive shaft 7 being rotatably mounted inside the fitting drum 6, the drive shaft 7 being engaged with the rotating shaft 3, the fitting drum 6 being able to rotate coaxially with the rotating shaft 3, a plurality of vent holes 8 being provided circumferentially on the outer surface of the fitting drum 6, a set of vacuum holes 9 being provided axially on the outer surface of the fitting drum 6, a solenoid valve 10 being provided on the right side of the mounting base 2, a mounting assembly 11 being provided inside the mounting base 2, a filter assembly 12 being provided on the right side of the solenoid valve 10, and an adjustment assembly 13 being provided on the right side of the mounting base 2.

[0022] In use, first fix the mounting base 1 in the designated working position, then start the motor 4. The motor 4 drives the rotating shaft 3 to rotate through the transmission belt 5. The rotating shaft 3 drives the drive shaft 7 and the bonding drum 6 to rotate coaxially. The solenoid valve 10 controls the ventilation and vacuuming of the vent hole 8 and the vacuum hole 9. The vacuum hole 9 generates negative pressure to adsorb the adhesive onto the surface of the bonding drum 6, completing the bonding and molding of the air spring. After molding, air is injected through the vent hole 8 to separate the molded capsule from the bonding drum 6, thereby achieving unloading. When the motor 4 is driven, the tension of the transmission belt 5 can be adjusted through the adjusting component 13, and gas impurities can be filtered through the filter component 12. Moreover, when processing different models of air springs, different models of bonding drums 6 can be replaced by the installation component 11.

[0023] The mounting assembly 11 includes two sets of arc-shaped blocks 110. Both ends of the drive shaft 7 are located inside the rotating shaft 3. The bottom of the arc-shaped block 110 is in contact with the surface of the drive shaft 7. A mounting block 111 is fixedly installed on the outer side of the arc-shaped block 110. A mounting groove 112 is opened inside the rotating shaft 3. A round rod 113 is fixedly installed on the bottom of the inner wall of the mounting groove 112. A round sleeve 114 is slidably installed on the surface of the round rod 113. A rhombus block 115 is fixedly installed on the top of the round sleeve 114. A first rhombus groove 116 is opened on the top of the mounting block 111. A second rhombus groove 117 is opened inside the first rhombus groove 116. The bottom of the rhombus block 115 is in contact with the bottom of the inner wall of the second rhombus groove 117. A circular block 118 is rotatably mounted on the bottom of the surface of the circular sleeve 114, and a limiting tension spring 119 is sleeved on the surface of the circular rod 113. The bottom of the limiting tension spring 119 is fixedly mounted to the bottom of the inner wall of the mounting groove 112, and the top of the limiting tension spring 119 is fixedly mounted to the bottom of the circular block 118.

[0024] When it is necessary to replace the bonding drum 6, the bonding drum 6 can be placed inside the mounting base 2, and the drive shaft 7 is located inside the rotating shaft 3. At this time, the arc-shaped block 110 can be placed inside the rotating shaft 3, and the bottom of the arc-shaped block 110 will be in contact with the surface of the drive shaft 7. Then, pull the rhombus block 115 upwards. The rhombus block 115 drives the circular sleeve 114 to move upwards. At this time, the rhombus block 115 is placed horizontally. At this time, the rhombus block 115 will pass through the first rhombus groove 116 upwards. When the height of the rhombus block 115 is higher than the first rhombus groove 116, the rhombus block 115 can be rotated ninety degrees. At this time, the limit spring 11 Under the action of 9, the limiting tension spring 119 will pull the round block 118, the round sleeve 114 and the rhombus block 115 to move to the bottom. At this time, the rhombus block 115 will enter the second rhombus groove 117. At this time, the rhombus block 115 can limit the mounting block 111 and the arc block 110. When it is necessary to disassemble the drive shaft 7 and the bonding drum 6, the rhombus block 115 can be pulled to the top. The rhombus block 115 will disengage from the second rhombus groove 117. Then, the rhombus block 115 is rotated ninety degrees. Due to the tension of the limiting tension spring 119, the rhombus block 115 will be reset through the first rhombus groove 116. Then the bonding drum 6 and the drive shaft 7 can be pulled out for replacement.

[0025] Please see Figure 1 - Figure 11 The filter assembly 12 includes a filter screen 120, the surface of which contacts the interior of the solenoid valve 10. Two sets of stops 121 are rotatably mounted on the right side of the solenoid valve 10. The left side of the stops 121 contacts the right side of the filter screen 120. A limit torsion spring 122 is fixedly mounted on the outer side of the stops 121. A rectangular block 123 is fixedly mounted on the right side of the solenoid valve 10. The top of the rectangular block 123 is fixedly mounted on the top of the limit torsion spring 122. Two sets of positioning plates 124 are fixedly installed on the right side of the filter screen 120, and the outer side of the positioning plate 124 contacts the inner side of the stop block 121. The limiting torsion spring 122 has an arc-shaped rod 125 inside. The bottom of the arc-shaped rod 125 extends to the bottom of the rectangular block 123, and the inner end of the arc-shaped rod 125 extends to the inner side of the stop block 121. The arc-shaped rod 125 is slidably installed with the stop block 121 and the rectangular block 123. A circular block 126 is fixedly installed on the inner end of the arc-shaped rod 125. The top of two sets of circular blocks 126 is in fixed contact with the bottom of the rectangular block 123, and the outer ends of the other two sets of circular blocks 126 are in contact with the inner side of the stop block 121. A positioning block 127 is fixedly installed on the top of the filter screen 120, a positioning rod 128 is fixedly installed on the left side of the positioning block 127, and a positioning groove 129 is opened on the right side of the solenoid valve 10. The positioning rod 128 and the positioning groove 129 are inserted into each other.

[0026] To prevent dust from entering the solenoid valve 10 during operation, when installing the filter screen 120, first push the stop block 121 outward along the trajectory of the positioning rod 128. The outward movement of the stop block 121 will compress the limiting torsion spring 122. Then, align the positioning rod 128 on the positioning block 127 with the positioning groove 129 on the solenoid valve 10 and insert it. Afterward, the stop block 121 can be released. At this time, the limiting torsion spring 122 will release its elasticity and drive the stop block 121 to rotate inward, tightly fitting the right side of the filter screen 120, thus completing the fixing of the filter screen 120. The filter screen 120 can filter gas impurities entering the solenoid valve 10 and the contact drum 6, preventing impurities from clogging the vent hole 8 and the vacuum hole 9. When disassembling and cleaning the filter screen 120, push the stop block 121 outward to pull out the filter screen 120.

[0027] Please see Figure 1 - Figure 11 The adjustment assembly 13 includes an adjustment wheel 130, the surface of the adjustment wheel 130 is in contact with the inside of the transmission belt 5, an adjustment block 131 is rotatably mounted on the left end of the adjustment wheel 130, an electric push rod 132 is fixedly mounted on the right side of the mounting base 2, and the telescopic end of the electric push rod 132 is fixedly mounted on one side of the adjustment block 131. A stabilizing block 133 is fixedly installed on the left side of the adjusting block 131, and a stabilizing groove 134 is provided on the right side of the mounting base 2. The stabilizing block 133 and the stabilizing groove 134 are slidably installed.

[0028] In use, when the transmission belt 5 becomes loose or slips, affecting power transmission, the electric push rod 132 can be activated. The telescopic end of the electric push rod 132 pushes the adjusting block 131 to slide along the stabilizing groove 134. The adjusting block 131 drives the adjusting wheel 130 to move synchronously. The adjusting wheel 130 squeezes the transmission belt 5 until the transmission belt 5 reaches the appropriate tension. After the tension of the transmission belt 5 is adjusted, the electric push rod 132 is turned off. The adjusting wheel 130 will remain in its current position and continue to tension and limit the transmission belt 5. The tension of the transmission belt 5 can be quickly adjusted through the adjusting component 13 to avoid the transmission belt 5 slipping and causing uneven rotation speed of the rotating shaft 3 and the contact drum 6.

[0029] The working principle of the above embodiments is as follows: When using the air spring, select the appropriate fitting drum 6 according to the model of the air spring to be processed. When it is necessary to install and fix the fitting drum 6, first place the fitting drum 6 inside the mounting base 2, so that both ends of the drive shaft 7 are embedded inside the rotating shaft 3, and place the arc block 110 inside the rotating shaft 3, so that the bottom of the arc block 110 is in close contact with the surface of the drive shaft 7. Then pull the diamond block 115 upward, and the diamond block 115 drives the circular sleeve 114 to slide upward along the circular rod 113. When the height of the diamond block 115 is higher than the first diamond groove 116, rotate the diamond block 115 ninety degrees. Under the pulling force of the limiting tension spring 119, the diamond block 115 is embedded inside the second diamond groove 117, completing the limiting of the arc block 110 and the mounting block 111.

[0030] When the transmission belt 5 is too loose, there is a risk of loosening and slipping during operation. At this time, the electric push rod 132 can be activated. The telescopic end of the electric push rod 132 pushes the adjusting block 131 to slide along the stabilizing groove 134. The adjusting block 131 drives the adjusting wheel 130 to move, so that the adjusting wheel 130 squeezes the transmission belt 5 until the transmission belt 5 reaches the appropriate tension. Then the electric push rod 132 is turned off, so that the adjusting wheel 130 remains in the current position, thereby achieving the tension limit of the transmission belt 5. When the air spring is being processed, the motor 4 can be started. The motor 4 drives the rotating shaft 3 to rotate through the transmission belt 5. The rotating shaft 3 drives the drive shaft 7 and the bonding drum 6 to rotate coaxially. The vacuum hole 9 on the outer surface of the bonding drum 6 is connected to the solenoid valve 10. After the solenoid valve 10 is opened, the vacuum hole 9 generates negative pressure, which smoothly adsorbs the adhesive to be processed onto the outer surface of the bonding drum 6. As the bonding drum 6 continues to rotate, the adhesive is gradually wound and bonded to the surface of the drum body, completing the air spring forming process. After the air spring is formed, the solenoid valve 10 switches the ventilation state. The gas enters between the bonding drum 6 and the forming capsule through the ventilation holes 8 arranged in the circumferential direction of the bonding drum 6. The gas thrust is used to separate the forming capsule from the surface of the bonding drum 6, so as to achieve unloading of the blank without damage. When it is necessary to disassemble the bonding drum 6, pull the diamond block 115 in the mounting assembly 11 upward to disengage the diamond block 115 from the second diamond groove 117. Turn the diamond block 115 ninety degrees, and under the tension of the limiting spring 119, the diamond block 115 returns to its original position through the first diamond groove 116. Remove the arc block 110 and pull the old bonding drum 6 and the drive shaft 7 out of the mounting base 2.

[0031] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods. As long as they can achieve their beneficial effects, they can be implemented. Therefore, this embodiment will not elaborate on their specific structural composition and working principle.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air spring forming drum mechanism, characterized in that: Includes a fixed base (1), on the top of which a mounting base (2) is fixedly installed. Two sets of rotating shafts (3) are rotatably mounted on the top of the mounting base (2). A motor (4) is fixedly mounted on one side of the mounting base (2). A transmission belt (5) is provided on the right side of the mounting base (2). Both ends of the transmission belt (5) are respectively connected to one set of rotating shafts (3) and the output shaft of the motor (4). A fitting drum (6) is provided inside the mounting base (2). A drive shaft (7) is rotatably mounted inside the fitting drum (6). The moving shaft (7) and the rotating shaft (3) are engaged. The bonding drum (6) can rotate coaxially with the rotating shaft (3). The outer surface of the bonding drum (6) is provided with a number of vent holes (8) spaced along its circumferential direction. The outer surface of the bonding drum (6) is provided with a set of vacuum holes (9) spaced along its axial direction. A solenoid valve (10) is provided on the right side of the mounting base (2). An installation assembly (11) is provided inside the mounting base (2). A filter assembly (12) is provided on the right side of the solenoid valve (10). An adjustment assembly (13) is provided on the right side of the mounting base (2).

2. The air spring forming drum mechanism according to claim 1, characterized in that: The mounting assembly (11) includes two sets of arc-shaped blocks (110). Both ends of the drive shaft (7) are located inside the rotating shaft (3). The bottom of the arc-shaped block (110) is in contact with the surface of the drive shaft (7). An mounting block (111) is fixedly installed on the outer side of the arc-shaped block (110). An mounting groove (112) is opened inside the rotating shaft (3). A round rod (113) is fixedly installed at the bottom of the inner wall of the mounting groove (112). A round sleeve (114) is slidably installed on the surface of the round rod (113). A rhombus block (115) is fixedly installed on the top of the round sleeve (114). A first rhombus groove (116) is opened on the top of the mounting block (111). A second rhombus groove (117) is opened inside the first rhombus groove (116). The bottom of the rhombus block (115) is in contact with the bottom of the inner wall of the second rhombus groove (117).

3. The air spring forming drum mechanism according to claim 2, characterized in that: A circular block (118) is rotatably mounted on the bottom of the surface of the circular sleeve (114), and a limiting tension spring (119) is sleeved on the surface of the circular rod (113). The bottom of the limiting tension spring (119) and the bottom of the inner wall of the mounting groove (112) are fixedly installed, and the top of the limiting tension spring (119) and the bottom of the circular block (118) are fixedly installed.

4. The air spring forming drum mechanism according to claim 1, characterized in that: The filter assembly (12) includes a filter screen (120), the surface of which is in contact with the interior of the solenoid valve (10). Two sets of stops (121) are rotatably mounted on the right side of the solenoid valve (10). The left side of the stops (121) is in contact with the right side of the filter screen (120). A limit torsion spring (122) is fixedly mounted on the outer side of the stops (121). A rectangular block (123) is fixedly mounted on the right side of the solenoid valve (10). The top of the rectangular block (123) is fixedly mounted on the top of the limit torsion spring (122).

5. The air spring forming drum mechanism according to claim 4, characterized in that: Two sets of positioning plates (124) are fixedly installed on the right side of the filter screen (120), and the outer side of the positioning plate (124) is in contact with the inner side of the stop block (121).

6. The air spring forming drum mechanism according to claim 4, characterized in that: The limiting torsion spring (122) has an arc-shaped rod (125) inside. The bottom of the arc-shaped rod (125) extends to the bottom of the rectangular block (123), and the inner end of the arc-shaped rod (125) extends to the inner side of the stop block (121). The arc-shaped rod (125) is slidably installed with the stop block (121) and the rectangular block (123).

7. The air spring forming drum mechanism according to claim 6, characterized in that: The inner end of the arc-shaped rod (125) is fixedly installed with a circular block (126), wherein the top of two sets of circular blocks (126) and the bottom of the rectangular block (123) are in fixed contact, and the outer ends of the other two sets of circular blocks (126) are in contact with the inner side of the stop block (121).

8. The air spring forming drum mechanism according to claim 4, characterized in that: A positioning block (127) is fixedly installed on the top of the filter screen (120), a positioning rod (128) is fixedly installed on the left side of the positioning block (127), and a positioning groove (129) is opened on the right side of the solenoid valve (10). The positioning rod (128) and the positioning groove (129) are inserted into each other.

9. The air spring forming drum mechanism according to claim 1, characterized in that: The adjustment assembly (13) includes an adjustment wheel (130), the surface of which is in contact with the inside of the transmission belt (5), an adjustment block (131) is rotatably mounted on the left end of the adjustment wheel (130), and an electric push rod (132) is fixedly mounted on the right side of the mounting base (2), with the telescopic end of the electric push rod (132) fixedly mounted on one side of the adjustment block (131).

10. The air spring forming drum mechanism according to claim 9, characterized in that: A stabilizing block (133) is fixedly installed on the left side of the adjusting block (131), and a stabilizing groove (134) is provided on the right side of the mounting base (2). The stabilizing block (133) and the stabilizing groove (134) are slidably installed.

Images